HP 56/57/58 cartridge ink dynamics

[Guest]

Archived from groups: comp.periphs.printers (More info?)

I have noticed that cartridge protective plastic bag (in the cardboard
shipping box) is perforated.

I also noticed that upper cartridge plenum is ventilated (through some
labyrinth passages) to atmosphere.

My question is - why ink in the cartridge is not drying out?

Where I can find more information about design of this small marvel?

Kind regards

Tadeusz

 

[Guest]

Archived from groups: comp.periphs.printers (More info?)

On Mon, 20 Dec 2004 22:35:03 +0100, "Tadeusz Jerzy Korsak"
<tkorsak@polbox.com> wrote:

>I have noticed that cartridge protective plastic bag (in the cardboard
>shipping box) is perforated.
>
>I also noticed that upper cartridge plenum is ventilated (through some
>labyrinth passages) to atmosphere.
>
>My question is - why ink in the cartridge is not drying out?
>
>Where I can find more information about design of this small marvel?
>
>Kind regards
>
>Tadeusz
>

While you are at it, find out why refill instructions sometimes say
to leave the label off after refilling.

http://www.jettec.com/instructions_jetset.asp?2=915

PJ

 

[Guest]

Archived from groups: comp.periphs.printers (More info?)

"Tadeusz Jerzy Korsak" <tkorsak@polbox.com> wrote in message
news:cq7go7$mp8$1@nemesis.news.tpi.pl...
>I have noticed that cartridge protective plastic bag (in the cardboard
> shipping box) is perforated.

This is to keep the printhead from being subjected to elevated humidity which
could damage the printhead.

> I also noticed that upper cartridge plenum is ventilated (through some
> labyrinth passages) to atmosphere.

As ink is printed from the cartridge it is necessary to allow air to enter the
cartridge. The labyrinth gives a very long narrow path which provides a
minimal vapor loss.

Regards,
Bob Headrick, not speaking for my employer HP

 

[steveb]

Archived from groups: comp.periphs.printers (More info?)

I think it's because they don't want to get the blame for the non-flow that
will eventually result from a misaligned label. Better to put it back on in
my opinion, but precisely so that all the ventilation channels are showing
as intended .


"PJX" <dingo@privacy.com> wrote in message
news:lhles05tq2k7i0tkpb1r1qct1nq1ib2r27@4ax.com...
> On Mon, 20 Dec 2004 22:35:03 +0100, "Tadeusz Jerzy Korsak"
> <tkorsak@polbox.com> wrote:
>
>>I have noticed that cartridge protective plastic bag (in the cardboard
>>shipping box) is perforated.
>>
>>I also noticed that upper cartridge plenum is ventilated (through some
>>labyrinth passages) to atmosphere.
>>
>>My question is - why ink in the cartridge is not drying out?
>>
>>Where I can find more information about design of this small marvel?
>>
>>Kind regards
>>
>>Tadeusz
>>
>
> While you are at it, find out why refill instructions sometimes say
> to leave the label off after refilling.
>
> http://www.jettec.com/instructions_jetset.asp?2=915
>
> PJ
>
>
>